Bag-filling machine



Patented June 13, 1922.

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- T all whom it may concern:

LOUIS H. HARTMAN,

Be it known that I, Louis IL HARTMAN, a citizen of the United States, and a resident of Toledo, in-the county-of Lucas and State of Ohio, have invented a certain new and useful Bag-Filling Machine; and I do hereby declare the following to be a full, clear,

-erenceimarked thereon, which form a part' and exact description of theinvention, such aswill. enable otherskskilled in the art to which it appertains to make and use the -same, reference being had to the accompanyingfdrawings, and to the characters of refof this specification. w

My invention nel'ates to bag filling machines wherein an automatic cut-ofi is pro-.

'vided for preventing the escape of material -when a predetermined weight of the material has been inserted in the bag In this connection it particularly prov-ides a mechanism .coacting with a flexible connector intermediate the fillingtube and the machine,

which will permit movement of the scale and, notwithstanding the limitedmovement necessitated by the connecter, the mechanism will operate to prevent movement of the material to the filler tube. By my invention is thus provided a means whereby no material from themachine is lost by the movement of the bag in response to .its weight which is counterbalanced to a certain point by the scales.

Also by my invention is .prov ded a mechanism that will respond to a very slight movement of the bag which is necessarily limited by reason of the short fiexible connector intermediate the filler tube and the machine.

The invention may be used in connection with filling and weighing machines of different forms and for'purpose of illustrating 'a practical application of my invention, I have selected one of such. forms as an example and shall describe it hereinafter. The; construction selected is illustrated in .the

accompanying drawings. g The figure shOWn in the drawings illustrates the application of my invention to a machinefoffilling bags with Portland cement.

1 in, the

f the machine to which the finely comminuted material is fed.' Itis provided with suitable agitatin'g devices 2 and 3. The device 3 operates to force the material towards an outlet 4. The casing 1 is provided with a figure, is the shell or casing of the machine and particularly that part of OF TOLEDO, OHIO, ASSIGNOR TO THE VALVE e COMPANY, or TOLEDO, oHIo, A oonrone'rron on QHIO. a

BAG-FILLING MACHINE.

Specification of Letters Patent. Patented June 13, 1922,

Application fiIe'd May 15,

1919. Serial I 70. 297,391. 7 I

suitable shutter 5 that passes across the outlet 4 to prevent. the material from being 1 forced from the casing-by the agitator 3. The shutter 5 is located within a cover 6 that is suitably securedto the casing 1. it

has anopening 7 extending through. a, boss that -registers with the outlet 4 and thus forms a tubular nipple'to which the filler tube or nozzleS may be connected by the flexible tube 9. The tube 9 may be formed of thin' rubber and yet of such a thickness that it will withstand the pressurecaused'by the ejectment of the material through-the npzzle by the operation of the agitator3.

-The bag 10 is hung ontothej' nozzle or filler tube8. The upper end of the bag is slipped onto the filler tube 8, the filler tube passing through anlopening formed in the corner of the bag. I i

The bag is thus supported the filler tube or nozzle 8. 'The nozzle is supported on a U member 11 having legs 12 to which are connected arms 13.v The arms 13 su'p port a suitable shield 14; in which thebag 10 may be inserted. The U member 11 also attached to uprights 15 that are suitably connected together by cross-beams 16;" The uprights 15 are also attached to the shield 14 and the uprights, the shield, the U member 11 and the nozzle or filler tube 8 are supportedon a scale 17. For purposesof illustration I have selected a conventional form of scale and the parts are supported on-the endof the scale arm-and are counter-- balanced by the weight 18. Thebag 10 belng supported by the filler tube or nozzle 8,--

is 'likewisecounterbalanced by the weight 18 until: the weight of the material passes be- {yon'd a certain point whereupon the up rights'15 t;he"U member 11, the nozzle 8 and the'bagl ld'lowers The movement of theparts jln' "response. to the'overbalancing of I theweight l8 ofvnecessity is very slight.

. The upper'ends of the uprights 15 are gulded -or' held substantially vertical by means of thevad'ustable rod 19which is attached to a brac et 20 secured to the casing 1. A lever 21 is also pivoted to the bracket 20, it being secured for" ivotal movements on a pin 22. It has a bi urcated arm 23 in which is located a rotatable member 24. The member 24-is and is securedin the bifurcated arm 23.

The movements of; the weighted member 24 provided with an open- 1 ing 35 through WhlQh thelpin 25 extends '7 relative mamas; are thus limitedv b I the slot 335 and pin 25. beams it) of the uprights 15 is provided will a n adjustable screw men'ibcr :28 and the lever 21. is provided with a rod :5? that catches onto the edge ot' the adjustable screw menu her 2.6 so that when the bag ll) makes a very slight (l()\\'\'l\\'2ll(l movement the lever 21 is tripped and fails. it lever 25% is also pivoted to the hracltet Q0 and engages a notch 20 Formed in the member Q-l so that when the ieve 21 is tripped the lever 28 also talls. The shutter 5 connected with the lever 28 and when the lever 28 tails. that is. when the scale allows the bags to lower a very slightextent, the shutter 5 closes the opening -l-. The lever 28 has an arm 36 that is provided with a roller 30 that is engaged by an arm Ell connected to the lever Zhso that when a bag to he filled is placed in position on the tiller tube or nozzle 8 the lever 31 may be litted and this will operate to lift the lever 28 and'causc the engagement of the lever by the weighted member 24.

The bag it) is held in position not only by reason ol the tact that it rests upon the filler tube or nozzle 8 but also it is locked inposition by means of the cam 32 that is pivoted between the uprights 15. The cam 32 is weighted so that when the bag is pushed on, the cam will automatically engage the bag and'upon any return or outward movement with respect to the nozzle 8. the bag will be clamped between the nozzle 8 and the ca1u 32. The cam is provided with an arm 33. The upper end of the cam 33 is curved or inclined outward and is located in the path of movement or the arm'29 so that when the lever 28 is dropped by the tripping of the lever 21 the arm 29 will strike the upper end of the arm 32-; and tilt itoutward and. tilt the cam 32 inward so as to automatically release the bag It) whereupon it may he withdrawn from the nozzle or filler tube 8. The cam 32 will thus be withheld until another bag has been inserted into position on the nozzle or filler tube 8 and the arm 31 has been raised so as to open the shutter 5 and cause the el'igagements between the lever 21 and the lever 28 and between the catch members 26 and 27 that hold the lever member :21 in position. These will again be tripped when the bag is again permitted to be lowered by overbalancing the scale.

Tho filler tube, or nozzle 8 is held in a horizontal position and very close to the boss of the plate' (5 in which the opening 7 is located. The nozzle is plac d close to the casing because there should be the least possible material in the nozzle and in the rubber connector 9 on account of its weight and the pressure of the discharge of the materialby the operation of the ejector or agitator 3. Consequently the movement of the nozzle 8 caused by the weight of the n1 ate rial OlIQ-HiIKtPHIil) of an inch to produce the necessary tripping operation of the lever ll.

lily my invention is thus provided a receptacle filling and weighing machine wherein there is little or no loss of material, no escape of the material into the surround ing air and yet which isexceediugly accurate and ellicient.

1 claim 1. in a receptacle filling and weighing machine, a horizontally extending filler tube tor receiving the upper end'ot' the receptacle, a machine casing, an ejector located in the casing for forcing the material through the tube, a frame for supporting the rece tacle and connected to the filler tube, a sea 6 for supporting the frame, a flexible horizontally disposed tubeinterconnecting the casing and the filler tube through which the material is Forced by the ejector. I

2. In a receptacle filling and weighing machine, a weighing scale for supporting the receptacle, a filler tube for receiving the upper end of the receptacle, a machine casing, a flexible tube interconnecting the filler tube and the casing for conducting comminuted material from the casing to the receptacle, an ejector't'or forcing the material from the casing through the flexible tube into the receptacle.

3. In a receptacle filling and weighing machine. a scale for supporting the receptacle, a filler tube tor receiving the upper end of the receptacle. a casing, aflexible tube interconnecting the filler tube and the casing, means for "forcibly ejecting the material from the casing through the flexible tube and tiller tube into the receptacle, and means coacting with the movement of the scale for automatically closing the connection between the casing and the receptacle when the scale moves by reason of the weight of the material.

a. In a receptacle filling and weighing machine, a filler tube, a frame, a scale for supporting the frame. the filler tube connectedto "the frame, a casing, an ejector located in the casing. a rubber tube "for connecting the filler tube with the casing,'a weighted cam pivoted on the trame for locking a part of the receptacle between the cam and the filler tube. a shutter located in the casing, a lever for operating the shutter and the cam, for closing the shutter and removing the cam from the part of the receptacle engaged by the cam, asecond lever engaging the first named lever. means located on the frame for tripping the second lever to disengage the first lever to cause the first lever to operate the shutter and the cam.

In testimony whereof I have hereunto signed my name to this specification.

LOUIS 'H. HARTMAN.

i in the bag should not; be more than.

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